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9x2=18 ¹Ó¤ÓµÍº·Õèä´é¤×Í 18 ÁҺǡ¡Ñ¹ä´é 1+8=9 9x3=27 ¹Ó¤ÓµÍº·Õèä´é¤×Í 27 ÁҺǡ¡Ñ¹ä´é 2+7=9 9x4=36 ¹Ó¤ÓµÍº·Õèä´é¤×Í 36 ÁҺǡ¡Ñ¹ä´é 3+6=9 9x8=72 ¹Ó¤ÓµÍº·Õèä´é¤×Í 72 ÁҺǡ¡Ñ¹ä´é 7+2=9 |
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879_ 798 081 ¼ÅÅѾ¸ì 81 ¨ÐËÒôéÇ 9 ŧµÑÇàÊÁÍ |
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987654321x9 = 8888888889 987654321x18 = 1777777778 987654321x27 = 2666666667 987654321x36 = 3555555556 987654321x45 = 4444444445 987654321x54 = 5333333334 987654321x63 = 6222222223 987654321x72 = 7111111112 987654321x81 = 8000000001 |
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1x9+2 = 11 12x9+3 = 111 123x9+4 = 1111 1234x9+5 = 11111 12345x9+6 = 111111 |
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1x8+1 = 9 12x8+2 = 98 123x8+3 = 987 1234x8+4 = 9876 12345x8+5 = 98765 |
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8x9 = ? ÇÔ¸Õ¤Ô´ (1)Å´ 8 ŧ 1 ä´é 7 à¢Õ¹àÅ¢ 7 äÇé㹤ӵͺ (2)ËÒàÅ¢ÁҺǡ¡Ñº 7 ä´é 9 àÅ¢¹Ñ鹤×Í 2 áÅéÇà¢Õ¹ 2 µèÍ ·éÒ¤ӵͺ ¨Ðä´é 72 à¾ÃÒЩйÑé¹ 8x9 = 72 |
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54x99 = ? ÇÔ¸Õ¤Ô´ (1) Å´ 54 ŧ 1 ä´é 53 à¢Õ¹àÅ¢ 53 äÇé㹤ӵͺ (2)ËÒàÅ¢ÁҺǡ¡Ñº 5 ãËéä´é 9 àÅ¢¹Ñ鹤×Í 4 à¢Õ¹ 4 µèÍ ·éÒ¨Ðä´é 534 ÂѧäÁ診¤Ð ËÒàÅ¢ºÇ¡¡Ñº 3 ä´é 9 àÅ¢¹Ñ鹤×Í 6 à¢Õ¹ 6 µèÍ·éÒ ¨Ðä´é5346 à»ç¹¤ÓµÍº à¾ÃÒЩйÑé¹ 54x99 = 5346 |
| ¢Ñ鹵͹ : (1)ºÇ¡àÅ¢á¹Ç¹Í¹ã¹áµèÅÐá¶Çà¢éÒ´éÇ¡ѹ ¨Ðà·èҡѹ 2+9+4 = 15,7+5+3 = 15,6+1+8 = 15 (2)ºÇ¡àÅ¢ã¹á¹ÇµÑéÇã¹áµÅÐËÅÑ¡à¢éÒ´éÇ¡ѹ¨Ðà·èҡѹ 2+7+6 = 15,9+5+1 = 15,4+3+8 = 15 (3)ºÇ¡àÅ¢µÒÁá¹Ç·Ðá§à¢Ò´éÇ¡ѹ(¨Ò¡ÁØÁ˹Öè§ä»ÍÕ¡ÁØÁ˹Öè§) 2+5+8 = 15, 6+5+4 = 15 |
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| ¢Ñ鹵͹ | µÑÇÍÂèÒ§ |
| 1.à¢Õ¹àÅ¢·Õèµéͧ¡Ò÷Ò | 12 |
| 2. ¤Ù³´éÇ 5 | 12x5 = 60 |
| 3. àÍÒ 6 仺ǡ | 60+6 = 66 |
| 4. àÍÒ 4 令ٳ | 66x4 = 264 |
| 5. àÍÒ 9 仺ǡ | 264+9 = 273 |
| 6. àÍÒ 5 令ٳ | 273x5 = 1,365 |
| 7. µÑ´àÅ¢ÊͧµÑÇËÅѧ·Ôé§ | 13 |
| 8. àÍÒ 1 ä»Åº | 13-1 = 12 |
| ¢Ñ鹵͹ | µÑÇÍÂèÒ§ |
| 1.à¢Õ¹àÅ¢ÊÒÁËÅÑ¡¨Ðà»ç¹àÅ¢ÍÐäáçä´é·ÕèàÅ¢·Ñé§ÊÒÁµÑÇäÁè«éӡѹ | 482 |
| 2. ¡ÅѺËÅÑ¡àÅ¢àÊÕÂãËÁè àÍÒµÑÇ˹éÒä»äÇéËÅѧ àÍÒµÑÇ˹éÒäÇé˹éÒ µÑÇ¡ÅÒ§àËÁ×͹à´ÔÁ | 284 |
| 3. àÍÒ ¨Ó¹Ç¹·Õè¹éÍÂä»ÅºÍÍ¡¨Ò¡¨Ó¹Ç¹·ÕèÁÒ¡ | 482 - 284 = 198 |
| 4. ºÍ¡à¾Õ§àÅ¢ËÅÑ¡·éÒ¢ͧ¤ÓµÍº | 8 |
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àÅ¢·éÒ ¤×Í 8 ÍÒÀóìºÍ¡ ÊØªÒµÔ µÍº ¤ÓµÍº¤×Í 198 áÅÐ͸ԺÒÂËÅÑ¡¡ÒÃÇèÒ à¸Î¨ÐàËç¹ÇèÒàÅ¢ËÅÑ¡ÃéÍ¡ѺàÅ¢ËÅѡ˹èÇÂàÁ×èͺǡ¡Ñ¹áÅéÇä´éà·èҡѺ 9 àÊÁÍ ´Ñ§¹Ñé¹ àÁ×èÍà¸ÍºÇ¡àÅ¢ËÅÑ¡ÊØ´·éÒÂËÃ×ÍËÅѡ˹èÇÂà·èҡѺ 8 ©Ñ¹¡çàÍÒä»ÅºÍÍ¡¨Ò¡ 9 ä´éà·èҡѺ 1 ¤ÓµÍº¨Ö§»ç¹ 198 ÁÕ¢éÍáÁéÇèÒ ¶éÒàÅ¢ËÅѡ˹èÇÂËÃ×ÍËÅÑ¡ÊØ´·éÒÂà»ç¹ 9 ¨ÐäÁèÁÕàÅ¢ã¹ËÅÑ¡ÃéÍ ¤ÓµÍº¨Ðà»ç¹ "99" |
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1 = (4 / 4)x(4 / 4) 2 = (4 / 4) + (4 / 4) 3 = (4 + 4 + 4) / 4 4 = 4 x (4 4) + 4 5 = ((4 x 4) + 4) 6 = 4 + ((4 + 4) / 4) 7 = (4 + 4) - (4 / 4) 8 = 4 + 4 + 4 - 4 9 = (4 + 4)+(4 / 4) 10 = (44 - 4) / 4 11 = (44 - 4) / 4 12 = (44 + 4) / 4 13 = 4 + ((4 - .4 ) / .4) 14 = ( 4 x (4 - .4) - .4 ) 15 = (4 x 4) - (4 / 4) 16 = 4 + 4 + 4 + 4 17 = (4 x4) + (4 / 4) 18 = (4 x 4)+(4 / .4) 19 = (((4 + 4 ) - .4) / .4) 20 = 4 x (4 + (4 / 4)) |
| ¢Ñ鹵͹ | µÑÇÍÂèÒ§ |
| 1.¡Ó˹´¤èҢͧà´×͹à¡Ô´â´Â 1 = Á.¤. 2 = ¡.¾. 3 = ÁÕ.¤. 4 = àÁ.Â. 5 = ¾.¤. 6 = ÁÔ.Â. 7 = ¡.¤. 8 = Ê.¤. 9 = ¡.Â. 10 = µ.¤. 11 = ¾.Â. 12 = ¸.¤. | à¡Ô´à´×͹ ÁÕ¹Ò¤Á = 3 |
| 2. àÍÒ 2 令ٳ¤èҢͧà´×͹ | 3 x 2 = 6 |
| 3. àÍÒ 5 仺ǡ | 6 + 5 = 11 |
| 4. àÍÒ 50 令ٳ | 11 x 50 = 550 |
| 5. àÍÒÍÒÂØ仺ǡ | àªè¹ÍÒÂØ 36 : 550 +36 = 586 |
| 6. àÍÒ 365 ä»Åº | 586 - 365 = 221 |
| 7. àÍÒ 115 仺ǡ | 221 + 115 = 336 |
| ¢Ñ鹵͹ | µÑÇÍÂèÒ§ àªè¹ 75 ¡¡ÓÅѧ 2 |
| 1.¹ÓàŢ˹éÒ 5 ã¹·Õè¹Õé¤×Í 7 | 7 |
| 2. ¹Ó 7 ÁÒ¤Ù³¡ÑºàÅ¢ÁÒ¡¡ÇèÒ 7 ÍÂÙè 1 ã¹·Õè¹Õé ¤×Í 8 | 7 x 8 = 56 |
| 3. ¹Ó¼ÅÅѾ¸ì·Õèä´é¨Ò¡¢éÍ (2) ÁÒàµÔÁ´éÇ 25 | 5625 |
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